Why must hydraulic fracturing or "hydrofracking" be used to extract natural gas from shale?
What will be an ideal response?
Most of the gas-containing fractures are oriented vertically and they are missed by traditional straight-down drilling.
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Earthquakes tend to do the most damage in economically advanced countries
Indicate whether the statement is true or false.
The pollution associated with industrial livestock farming is increasing in the United States
Indicate whether the statement is true or false.
________ cities are most closely integrated into the global economic system because they are at the center of the flow of ________ and ________
A) Capital; tourism; media B) Global; information; capital C) Large; commerce; global institutions D) Global; global politics; tourism E) Capital; politics; stock markets
Pollutants such as chlorofluorocarbons deplete atmospheric ozone
A. When chlorine-containing molecules are oxidized at the expense of O3 B. When carbon reacts with O3 to form CO3 C. When nitrogen combines with O3 to form NOx D. Because chlorine is most stable as ClO3 E. None of these is correct